FACTORS AND TABLES OF EQUIVALENTS USED IN FORESTRY 7 

 Table 11. — Weight of various units of volume of water, with approximate values 



Unit of volume 



Weight of various units of volume in — 



Grains 



Ounces 



Pounds 



Grams 



Kilograms 





15. 432^ 



(15H) 



252. 893 



(250) 



0. 035274 



(Ho) 



0. 578040 



(%) 



16. 6909 



33. 3818 

 (33) 



35. 2749 

 (35) 



133. 527 

 (135) 



2 1, 000 



0. 002205 



0, 036128 



(Ho) 

 1.04318 



0) 

 2. 0863(5 



(2) 

 2. 20468 



(2H) 



8. 34545 

 (8) 



62. 4283 



(62H) 



77. 6893 



(80) 



220. 468 



(220) 



1, 685. 56 

 (1, 700) 



2, 204. 62 

 (2200) 



1 



16. 3872 

 (16) 



0.001 





0. 016387 





(Ho) 

 0. 473179 









(H) 

 0. 946359 



1 liter 





1 1,000 



(1) 

 11 







3. 78543 









(4) 





Short tons 



Metric tons 





0.031214 



042) 



0. 038845 



0/31) 



0. 110234 

 0/9) 



0. 8427S2 

 ( 4 /s) 



3 1. 1023/ 



0. 028317 



(Hs) 



0. 035239 



0/28) 



10.1 



0. 764559 

 1 ■ 



28. 3170 





(28) 

 35. 2393 







1 100 







764. 559 







1,000 









1 A liter is, by definition, a unit of capacity equivalent to the volume occupied by the mass of a kilogram 

 of pure water at its maximum density (4°C.) and under a pressure of 760 mm. It is actually equivalent in 

 volume to 1.000027 cubic decimeters. In forestry measurements, however, 1 liter is considered as weighing 

 1 kilogram and having a volume of 1 cubic decimeter. 



2 In forestry measurements, the weight of 1 cubic foot is taken as 1,000 ounces. The absolute value is 

 998.853 ounces. 



3 Approximately 1 long ton. 



Table 12. — Rainfall per unit area; equivalent measurements 



Unit of rainfall 



In cubic 

 inches 



In gal- 

 lons 



In cubic 

 feet 



In short 

 tons 



In liters 



In metric 

 tons 



1 inch per acre 



1 millimeter per hectare - 

 1 millimeter per acre 



272, 640 

 610, 234 

 246, 954 



27, 154 

 2,642 

 1,069 



3,630 

 353 

 143 



113.3 

 11.0 

 4.5 



102, 788. 

 1 10, 000 

 4, 076. 16 



102.8 



10 



4.0 



1 9,999.73. 



Table 13. — Reservoir capacity, in equivalent measurements 



Acre-foot l 



Gallons 



Cubic 



feet 



Cubic 



yards 



Cubic 

 meters 



1 



325, 85/ 



43, 560 



1, 613. 33 



1, 233. 49 



1 The volume of a prii m 1 foot high with a base of 1 acre. 



